science
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UK couple have dead dog cloned in South KoreaLaura Jacques and Richard Remde are first British customers of Sooam Biotech Research Foundation
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The Christmas poisoner who murdered by the book ...A bottle of wine laced with deadly poison; a stack of Agatha Christie books in the suspect’s home: the ingredients for a true-life Christmas Eve crime -
Explosions at US army ammunition store allow 'forensic' seisomologyScientists able to distinguish ‘signatures’ and sequence of mortar fire and other blasts remotely, revealing seismology as a potential aid during terror attacks -
New genetic theory might pave way to understanding human intelligenceScientists from Imperial College believe that intelligence may be influenced by two networks of genes, possibly controlled by a master regulatory system
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'Welcome back, baby': Elon Musk celebrates SpaceX rocket launch – and landingFalcon 9 rocket blasted off from Cape Canaveral, delivered communications satellites to orbit before its main-stage booster returned to a landing pad
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Winter solstice: the importance of daylightDean Burnett: It’s the winter solstice, the shortest day of the year. But be wary, as the amount of daylight we experience can affect our bodies and brains.
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Elon Musk nominated for 'luddite' of the year prize over artificial intelligence fearsWashington thinktank claims SpaceX founder, Bill Gates and Stephen Hawking, are contributing to ‘alarmist’ concern about machine intelligence
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Blood pressure treatment guidelines should be revised, study saysBased on trials over two decades, study says millions of lives could be saved by lowering threshold at which pressure is treated
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key issues
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SpaceSpaceThe Guardian view on space exploration: awaken the force with a global effortEditorial: Different countries have different objectives, but exploring space relies on cooperation and planning
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BiologyBiologyA British couple have paid $100,000 to clone their dog. But however tempting the process might be for a human egoist, it would destroy the point of life: that it endsI considered cloning myself – but I’m having second thoughts
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GeneticsGeneticsUK couple have dead dog cloned in South KoreaLaura Jacques and Richard Remde are first British customers of Sooam Biotech Research Foundation
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Medical researchMedical researchBlood pressure treatment guidelines should be revised, study saysBased on trials over two decades, study says millions of lives could be saved by lowering threshold at which pressure is treated
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PsychologyPsychologyIn these troubled times the urge is to seek comfort in false memories. But that instinct is misguidedWe can’t embrace the future if we’re longing for the past
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PhysicsPhysicsHow the robin's red breast could be the key to colours that never fadeColours of some birds created through light manipulation by feather nanostructure; knowledge could lead to non-fading fabric and paint colours
in depth
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Natural chain that hangs the mistletoePaul Simons With more blackcaps overwintering and wiping the sticky seeds straight on to branches, the mistletoe is thriving
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opinion
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The Guardian view on space exploration: awaken the force with a global effortEditorial: Different countries have different objectives, but exploring space relies on cooperation and planning
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A British couple have paid $100,000 to clone their dog. But however tempting the process might be for a human egoist, it would destroy the point of life: that it endsI considered cloning myself – but I’m having second thoughts
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pictures & video
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2015: the year in science - in picturesFrom the excitement of the Pluto flyby to the discovery of new dinosaurs, we take a look back at some of the biggest science stories of the past 12 months
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How we cloned our dead boxer dog Dylan – videoDistraught after the death last summer of her much-loved eight-year-old boxer dog Dylan, Laura Jacques and her partner Richard Remde tell how they found a way to keep their pet’s memory alive
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SpaceX rocket launches then lands safely back on Earth – videoA SpaceX Falcon 9 rocket blasted off from Florida before the reusable main-stage booster turned around and landed safely back on Earth in a dramatic spaceflight first
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Nasa astronauts repair International Space Station – videoScott Kelly and Tim Kopra venture outside the International Space Station on Monday for an unplanned spacewalk to fix a stuck railcar
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Observer science quiz of the year – part 3From giant fish to black-footed ferrets and lifesize personal robots – how much do you know about the breakthroughs of 2015?
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Life in space is 'absolutely spectacular', says Tim Peake – videoSpeaking from the International Space Station on Friday, UK astronaut Tim Peake says his first three days in space have been better than he imagined
New type of moon rock discovered by Chinese lunar lander